Gilles Deleuze, 1969
A fantastic, impactful, delirious book I have seen cited so many times and cited myself, perhaps too much, with good reason. Deleuze attempts to dismantle notions of essence and appearance which have appeared in Western philosophy in a manner he traces back to Plato. The discussions of truth as appearance of appearance are particularly titillating and I only wish I had the time to plough further through this before I put it down. If I was crafting a philosophy course I would put this on the reading list.